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• How to handle ctrl+arrow in Javascript?

  - by MartyIX

  I've noticed an problem when trying to catch keyboard shortcut: CTRL+an arrow. I've handled keydown event. Now when I hold CTRL key then keydown event is fired once. If I hold an arrow (so that now I'm holding CTRL+an arrow) it doesn't fire another event. Is it forbidden from any reason? I guess I've already encountered this problem in Opera a few years ago and there was an option for it in browser. My results: holding CTRL, press an arrow -- fires event for CTRL and doesn't fire an event for an arrow press CTRL + an arrow at once -- fires one event but only with keycode of CTRL. holding CTRL, press a letter (eg. S) -- works as expected press CTRL + letter (eg. S) -- works as expected (Results are identical in Chrome and Firefox. Is the behaviour described above a standard?) I'm using: function OnKeyDown(e) { } e.ctrlKey, e.which properties of event The question is: what might be the problem?

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• How to access key itself using javascript

  - by Wondering

  Hi All, I have a json like: var xx= {'name':'alx','age':12}; now i can read the value of name which is 'alx' as xx[0].name, but how to retrieve value of 'name' itself, means how i can fetch Key @ run time. Please let me know if my question is not clear and you guys want more info. Thanks.

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• How do you set a cookie to be accessible across the entire domain in Javascript

  - by Tzarkov

  I suppose there should be a way to set a cookie to be accessible from the entire domain nevermind from which directory you are setting the cookie. Say in mypage.com/blue/index.php y set the cookie "colour=blue;" this way: document.cookie = "colour" + "=" + "blue" + "; expires=" + expireDate.toGMTString() + "; path=/"; Using this code, the cookie retrieval function in mypage.com/home.php can't access the content of the cookie. If it was just from first level directories that the cookie needs to be set, we would be ok by doing path=../ instead of path=/ But how do you go about writing generic code that sets a cookie that is accessible from any page in that domain not minding how deep in the file structure is the page the cookie is being set from?

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• How to escape regular expression in javascript ?

  - by Relax

  My codes is like pattern = 'arrayname[1]'; // fetch from dom, make literal here just for example reg = new RegExp(RegExp.quote(pattern), 'g'); mystring.replace(reg, 'arrayname[2]'); But it just cannot get running with error message says: "RegExp.quote is not a function", am i missing something simple?

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• Javascript function returning number with two decimals...?

  - by muzzledBYbrass

  I have a function to return points along a line and my return comes back with two decimal points...? For example, a return of my variable px will be something like -88.4029.032940598. vx is the x vector and mult is the distance of the line plus distance to calculate the point. Here is the operation that is returning these values: var mult = parseFloat(mag + theUnit); var px = coord_one.x_point + (vx * mult); console.log(px); Never have seen this before- I appreciate any and all help!

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• Refactor: Javascript block

  - by Shpigford

  Need some help refactoring this code: $("span[rel=color_content]").ColorPicker({ onChange: function (hsb, hex, rg) { $("span[rel=color_content]").css('background-color', '#' + hex); } }); $("span[rel=color_link]").ColorPicker({ onChange: function (hsb, hex, rg) { $("span[rel=color_link]").css('background-color', '#' + hex); } }); $("span[rel=color_selected]").ColorPicker({ onChange: function (hsb, hex, rg) { $("span[rel=color_selected]").css('background-color', '#' + hex); } }); $("span[rel=color_page]").ColorPicker({ onChange: function (hsb, hex, rg) { $("span[rel=color_page]").css('background-color', '#' + hex); } }); $("span[rel=color_player]").ColorPicker({ onChange: function (hsb, hex, rg) { $("span[rel=color_player]").css('background-color', '#' + hex); } }); The only thing changing between each is the contents of the rel attribute.

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• Selecting an option with javascript

  - by Fibericon

  I have a drop down menu that I want to have selected on page load. This is what I'm using at the moment: var selector = document.getElementById("action_person").firstChild; var n = 0; while(selector.options[n] != null) { if(selector.options[n].value == "person") { selector.options.selectedIndex = n; } n++; } I've also tried replacing selector.options.selectedIndex = n with selector.options[n].selected = true. However, it never selects for me. It always shows the item at the top of the drop down. I've verified that the value "person" does exist in the drop down, and that the variable "selector" does point to a valid drop down. What am I doing wrong here?

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• How to access a variable outside a function in Javascript

  - by Luke101

  Here is the code I am working with: $(document).ready(function () { var TemplateEditor = function () { var GroupClassName = 'group'; var SelectedGroup = 0; var BindClicks = function () { $('.CriteriaSelections').unbind('click').click(function (event) { event.preventDefault(); if (fnIsTheClickedBoxaGroup($(this))) { TemplateEditor.GroupClicked(); } else { TemplateEditor.CriteriaClicked($(this), SelectedGroup); } }); $('.groupselected').unbind('click').click(function (event) { event.preventDefault(); SelectedGroup = $(this).attr('group-'.length); TemplateEditor.SelectGroup(SelectedGroup); }); } var fnGetGroupID = function (Obj) { if (fnIsTheClickedBoxaGroup(Obj) == true) { return null; } else { //Get parent which is the group var ObjParent = Obj.parent(); var GID = ObjParent.attr('id').substr('group-'.length); return GID; } } var fnIsTheClickedBoxaGroup = function (Obj) { var GetClass = Obj.attr('class'); if (GetClass == GroupClassName) { return true; } else { return false; } } return { Init: function () { BindClicks(); }, CriteriaClicked: function (Obj, GroupID) { $('<div>').attr({ id: '' }).addClass('selection').text(Obj).appendTo('#group-' + GroupID); }, GroupClicked: function () { }, SelectGroupClicked: function () { }, UpdateTargetPanel: function () { } }; } (); TemplateEditor.Init(); }); I am trying to access this variable: GroupClassName This variable is inside this function var fnIsTheClickedBoxaGroup = function (Obj) { var GetClass = Obj.attr('class'); if (GetClass == GroupClassName) { return true; } else { return false; } } When I run the program it says GroupClassName is undefined. Am I missing something here?

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• Posting form using javascript and json with nested objects

  - by Tim

  I have an html form that has the following structure: <input type="text" name="title" /> <input type="text" name="persons[0].name" /> <input type="text" name="persons[0].color" /> <input type="text" name="persons[1].name" /> <input type="text" name="persons[1].color" /> I would like to serialize this into the following json: { "title":"titlecontent", "persons":[ { "name":"person0name", "color":"red" }, { "name":"person1name", "color":"blue" } ] } Notice that the number of persons can vary from case to case. The structure of the html form can change, but the structure of the submitted json can't. How is this done the easiest?

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• JavaScript sorting array from nested array?

  - by Tim

  I have an array: letterFrequency = [["a", 12], ["b", 25], ["c", 34], ["d", 1], ["e", 35], ["f", 8], ["g", 7], ["h", 67], ["i", 35], ["j", 0], ["k", 53], ["l", 0], ["m", 0], ["n", 3], ["o", 0], ["p", 0], ["q", 3], ["r", 153], ["s", 0], ["t", 0], ["u", 15], ["v", 0], ["w", 0], ["x", 3], ["y", 0], ["z", 0]] and I want to sort it in descending order based on the number within the nested array i.e. letterFrequency[i][1]. So I want the most popular letter to be first. How would I do this?

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• javascript var assignment conversion to target type

  - by pbhd

  searching for a function, which converts rhs to the type of lhs. e.g. var x=false // x is boolean now; x=assign (x, "true"); //should convert "true" to boolean and return that x=assign (x, 1); // dto, convert 1 to true x=0 // x is number x=assign (x, "123"); // should convert "123" to 123; so such a function can be written, thats not the question. But: Is there somewhere a somehow complete implementation of such a thing? I started with something like that: function assign (v, x) { if (typeof v==typeof x) { return x; } switch (typeof v) { case 'boolean' : { return x=='true'?true:false; } case 'number' : { return parseFloat(x); } } return "xxx"; } var v=true; var x='true'; var r1=assign (v, x); console.log (typeof r1+ " "+r1); v=10; x="123"; var r1=assign (v, x); console.log (typeof r1+ " "+r1); which of course is not complete, but maybe shows what I'm goig for.

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• jQuery / Javascript if statement speed

  - by Sam

  Given: var isIE = $.browser.msie && !$.support.opacity, isIE6 = isIE && $.browser.version < 7; Which would be faster: if(isIE6){ doSomething(); } else { doSomethingElse(); } OR if(!isIE6){ doSomethingElse(); } else { doSomething(); } Are they exactly the same in terms of speed?

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• Inserting a newline into a pre tag (IE, Javascript)

  - by Itay

  In IE when I insert text into a <pre> tag the newlines are ignored: <pre id="putItHere"></pre> <script> function putText() { document.getElementById("putItHere").innerHTML = "first line\nsecond line"; } </script> Using \r\n instead of a plain \n does not work. <br/> does work but inserts an extra blank line in FF, which is not acceptable for my purposes.

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• Firing a Keyboard Event at the Body - JavaScript (?)

  - by user317985

  I've done a lot of research on this but have come up empty handed. What I would like to do is invoke or create an event for the right arrow key (Key Code 39). I was planning on using an onclick event inside an tag to go to a function where this event could be 'fired'. Any help would be appreciated. If anyone needs context, I have a jQuery content slider that's functionality is very hard to alter and currently the functionality I need to emulate only occurs when a user hits the right arrow on their keyboard. What I would like to do is tie an onclick() event to a image that when clicked on fires the right keyboard event and the content will slide. Please let me know if I can provide further details or explanation. My working demo for this is: http://greenplanet3d.com

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• Ternary Operators in JavaScript Without an "Else"

  - by Oscar Godson

  I've been using them forever, and I love them. To me they see cleaner and i can scan faster, but ever since I've been using them i've always had to put null in the else conditions that don't have anything. Is there anyway around it? E.g. condition ? x=true : null ; basically, is there a way to do: condition ? x=true; Now it shows up as a syntax error...

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• Opening PDF String in new window with javascript

  - by DaveC

  Hello, I have a formatted PDF string that looks like %PDF-1.73 0 obj<<< /Type /Group /S /Transparency /CS /DeviceRGB >> /Resources 2 0 R/Contents 4 0 R>> endobj4 0 obj<> streamx??R=o?0??+??=|vL?R???l?-???,???Ge?JK????{???Y5?????Z?k?vf?a??`G????Asf?z????`%??aI#?!;?t???GD?!???<?????B?b?? ... 00000 n 0000000703 00000 n 0000000820 00000 n 0000000926 00000 n 0000001206 00000 n 0000001649 00000 n trailer << /Size 11 /Root 10 0 R /Info 9 0 R >>startxref2015%%EOF I am trying to open up this string in a new window as a PDF file. Whenever I use window.open() and write the string to the new tab it thinks that the text should be the contents of an HTML document. I want it to recognize that this is a PDF file. Any help is much appreciated

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• jquery javascript error using $(...) selector

  - by waitinforatrain

  Hi, I'm migrating some old code to jquery: xmlHttp.onreadystatechange = function() { if (xmlHttp.readyState == 4) { $("#" + ajaxArea).html (xmlHttp.responseText); $("#" + ajaxArea).attr('title', 'Login'); $("#" + ajaxArea).dialog({ height : 140, modal : true }); } }; where ajaxArea is the ID of a DIV in the HTML. The dialog bit is basically adapted from the jQuery example here: http://jqueryui.com/demos/dialog/#modal All of it works fine up until the last line. Firefox throws an error that simply says "$(" for that line. Anyone know what might be causing this?

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• JavaScript: If clause partially executed !!!

  - by arwa

  Hi everyone My problem is that when the condition is true it will close the window but not execute the php part ! here goes my code.. function onClose() { var r=confirm("Is the meeting Over!"); if (r==true) { window.close(); } else { } } </blink> this is the php part.. $sql="UPDATE previousmeetings SET Live='0' WHERE MeetingID='34'"; //$meeting_id $sql2="UPDATE previousmeetings SET Live='1' WHERE MeetingID='34'";

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• Javascript/Jquery - Reset text box view area after tab

  - by JK

  I don't know what this is called so its hard to google for it. If you have a plain html input type=text with a small width eg 20 and then type more characters than can be displayed, it shows the last characters you type. And the first ones are scrolled out of view: This is my long text // this is the whole string my long string // this is what is actually visible in the input box How do I make it so that when you hit tab, the view area resets so that the start of the string is visible and the end is hidden? my long string // this is what is visible in the input box when typing This is my // this is what is I want to be visible in the input box after you hit tab What do you call this, and how do you do it?

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• IE incompatibility with JavaScript (surprised?)

  - by Midevil Chaos

  I am coding my website, and a friend of mine was helping me. This code does not work on IE 10 (Windows 7). I even tried the legacy modes and to no avail. Upon clicking on "services" for example, this code would work on FF or Chrome. But, not on IE. Can someone help me fix this code so it would also work on IE? $('#services-fr-2').on('click',function(){ $( ".clientsFr" ).hide(); $('.servicesFr').fadeToggle(); $('#green-pouch-fr').animate({ 'top':'450px'//, //'height':'450' })

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• Hiding and Showing Elements with JavaScript

  - by user1658756

  I have an arrow on my site that I'd like if onclick, it hides one element, and shows another. Hitting it again, will hide the element that was shown and show the element that was hidden. Is that possible to do without jQuery? For example, I have <div id="arrow"><a href="#">?</a></div> <div id="ad"></div> <div id="description">Hidden</div> <div id="nav">Also Hidden</div> So at first, the ad is showing, and then one you've clicked the arrow, I'd like the ad to hide, and then unhide the description and nav.

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• Skipping arguments in JavaScript

  - by hekevintran

  function my_func(a, b){ if(typeof(a) !== 'undefined'){ // do stuff } return b; } How can I call this function will only the second argument? In other words, I want a to be undefined.

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• how to display the values of a map variable in javascript

  - by user329551

  I have a javasrcript variable var hash = { '.bmp' : 1, '.gif' : 1, '.jpeg' : 1, '.jpg' : 1, '.png' : 1, '.tif' : 1, '.tiff' : 1, }; I want to display the values (.bmp, .gif, .jpeg, .jpg, .png, .tif, .tiff) of this "hash" object in my alert message. How can I do this? Please help.

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• Javascript: regular expression

  - by Dmitry Nesteruk

  I need to replace a substring from some string. I've already created corrected code for doing it. But I amn't sure is it best way. Please, see code below: var str = 'test ruby,ruby on rails,ruby,' var substr = 'ruby'; var reg = new RegExp(',' + substr + ',|^' + substr + ',', 'gi'); str.replace(reg, ','); //returns "test ruby,ruby on rails,"

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• Javascript Iterator Class

  - by Alsciende

  Do you know a js library that implements a generic Iterator class for collections (be it Arrays or some abstract Enumerable) with a full set of features, like the Google Common or the Apache Commons?

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